Process for the selective removal of sulphur compounds from synthesis gas

Abstract

A process for the selective removal of sulphur compounds from synthesis gas being rich in carbon monoxide and containing hydrogen, carbon monoxide and containing hydrogen, carbon dioxide and steam comprising contacting the synthesis gas at a maximum contact temperature of 100° C. with an absorbent comprising Cu/ZnO compounds and being prepared by thermal decomposition of a corresponding carbonate and activation of the thermal decomposed carbonate with a reducing gas.

1. A process for the selective removal of sulphur compounds from synthesis gas containing at least 5% carbon monoxide, at least 5% hydrogen, at least 0.5% carbon dioxide and water at a pressure of at least 15 bar comprising contacting the synthesis gas at a maximum contact temperature of 100° C. with an absorbent comprising Cu/ZnO compounds which has been activated with a reducing gas. 
     
     
       2. The process of  claim 1 , wherein the sulphur compounds comprise H 2 S and COS. 
     
     
       3. The process of  claim 1 , wherein the synthesis gas contains H 2 S in an amount effective for suppression of metal dusting of metals in contact with the synthesis gas within a temperature range between 300° C. to Boudouard temperature of the synthesis gas.